Highly Diastereoselective Esterification of Ketenes Generated In Situ from Acyl Chlorides with (R)-Pantolactone Derivatives

2013 ◽  
Vol 2013 (33) ◽  
pp. 7467-7470 ◽  
Author(s):  
Takafumi Yamagami ◽  
Masanori Hatsuda ◽  
Masayuki Utsugi ◽  
Ryo Kobayashi ◽  
Yasunori Moritani
Keyword(s):  
Acyl Chlorides

scholarly journals Reaction of Acyl Chlorides withIn SituFormed Zinc Selenolates: Synthesis of SelenoestersversusRing-Opening Reaction of Tetrahydrofuran

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Gemma Bellino ◽  
Marialaura Scisciani ◽  
Jaqueline Pinto Vargas ◽  
Luca Sancineto ◽  
Luana Bagnoli ◽  
...  
Keyword(s):  
Acyl Chlorides ◽  
Unexpected Reaction

Attempting to apply thein situproduction of PhSeZnSePh to the synthesis of selenoesters, an unexpected reaction involving the solvent (tetrahydrofuran) was observed and studied. We reported here some evidences about the mechanism and the possibility to control the chemoselectivity of this new reaction that afforded the formation of interesting selenoderivatives in which the selenium moiety and the carboxylic one are spaced by four carbon units.

Pd/BaSO4-catalyzed cross coupling of acyl chlorides with in situ generated alkynylzinc derivatives for the synthesis of ynones

2013 ◽  
Vol 91 (5) ◽  
pp. 333-337 ◽  
Author(s):  
Hu Yuan ◽  
Huizi Jin ◽  
Bo Li ◽  
Yunheng Shen ◽  
Rongcai Yue ◽  
...  
Keyword(s):  
Simple Procedure ◽  
Cross Coupling ◽  
Acyl Chlorides

An efficient and operationally simple procedure using Pd/BaSO4-catalyzed cross coupling of acyl chlorides with in situ generated alkynylzinc derivatives was developed, giving the corresponding ynones at yields of 50%–96%.

ChemInform Abstract: Highly Diastereoselective Esterification of Ketenes Generated in situ from Acyl Chlorides with (R)-Pantolactone Derivatives.

ChemInform ◽  
2014 ◽  
Vol 45 (18) ◽  
pp. no-no
Author(s):  
Takafumi Yamagami ◽  
Masanori Hatsuda ◽  
Masayuki Utsugi ◽  
Ryo Kobayashi ◽  
Yasunori Moritani
Keyword(s):  
Acyl Chlorides

Polyethylene glycol-400/H3PO2: an eco-friendly reductive system for the synthesis of selanylesters

2015 ◽  
Vol 2 (11) ◽  
pp. 1531-1535 ◽  
Author(s):  
G. Perin ◽  
M. B. Silveira ◽  
A. M. Barcellos ◽  
R. G. Jacob ◽  
D. Alves
Keyword(s):  
Polyethylene Glycol ◽  
Green Method ◽  
Polyethylene Glycol 400 ◽  
Hypophosphorous Acid ◽  
Acyl Chlorides ◽  
Peg 400

An alternative green method was described for the synthesis of selanylesters by reactions of acyl chlorides with arylselenols, generated in situ by reaction of diaryl diselenides with hypophosphorous acid (H3PO2) using polyethylene glycol-400 (PEG-400) as the solvent.

ChemInform Abstract: Pd/BaSO4-Catalyzed Cross Coupling of Acyl Chlorides with in situ Generated Alkynylzinc Derivatives for the Synthesis of Ynones.

ChemInform ◽  
2013 ◽  
Vol 44 (44) ◽  
pp. no-no
Author(s):  
Hu Yuan ◽  
Huizi Jin ◽  
Bo Li ◽  
Yunheng Shen ◽  
Rongcai Yue ◽  
...  
Keyword(s):  
Cross Coupling ◽  
Acyl Chlorides

Pd-Catalyzed Cross-Coupling of Acyl Chlorides with In Situ–Generated Alkynylzinc Derivatives for the Synthesis of Ynones

2013 ◽  
Vol 43 (20) ◽  
pp. 2817-2823 ◽  
Author(s):  
Hu Yuan ◽  
Yunheng Shen ◽  
Shichong Yu ◽  
Lei Shan ◽  
Qingyan Sun ◽  
...  
Keyword(s):  
Cross Coupling ◽  
Acyl Chlorides

ChemInform Abstract: Pd-Catalyzed Cross-Coupling of Acyl Chlorides with in situ-Generated Alkynylzinc Derivatives for the Synthesis of Ynones.

ChemInform ◽  
2013 ◽  
Vol 45 (1) ◽  
pp. no-no
Author(s):  
Hu Yuan ◽  
Yunheng Shen ◽  
Shichong Yu ◽  
Lei Shan ◽  
Qingyan Sun ◽  
...  
Keyword(s):  
Cross Coupling ◽  
Acyl Chlorides

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

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